package com.bgl.concurrency;

import lombok.extern.slf4j.Slf4j;

import java.util.concurrent.*;

/**
 * Created by Bgl on 2018/3/18.
 */
@Slf4j
public class ConconrrencyTest {

    private static int clientTotal = 10000;

    private static int threadTotal = 200;

    private static int count = 0;

    public static void main(String[] args) throws InterruptedException {
        ExecutorService executorService = Executors.newCachedThreadPool();
        Semaphore semaphore = new Semaphore(threadTotal);
        CountDownLatch countDownLatch = new CountDownLatch(clientTotal);
        for (int i = 0; i < clientTotal; i++) {
            executorService.execute(new Runnable() {
                @Override
                public void run() {
                    try{
                        semaphore.acquire();
                        add();
                        semaphore.release();
                    } catch (Exception e) {
                        log.info("exception : ", e);
                    }
                    countDownLatch.countDown();
                }
            }


//            () -> {
//                try{
//                    semaphore.acquire();
//                    add();
//                    semaphore.release();
//                } catch (Exception e) {
//                    log.info("exception : ", e);
//                }
//                countDownLatch.countDown();
//            }
            );
        }
        countDownLatch.await();
        executorService.shutdown();

        log.info("count : {}", count);
    }

    private static synchronized void add() {
        count++;
    }
}
